switch(expression){casevalue://语句break;//可选casevalue://语句break;//可选//你可以有任意数量的case语句default://可选//语句} 1 2 3 4 5 6 7 8 9 10 11 这里的expression都支持哪些类型呢? 基本数据类型:byte, short, char, int 包装数据类型:Byte, Short, Character, Integer 枚举类型:Enum ...
Stringfruit="apple";switch(fruit){case"apple":System.out.println("Apple is red.");break;case"...
In this example, we determine a comment based on a grade represented by a character. Main.java </> Copy public class Main { public static void main(String[] args) { char grade = 'B'; switch (grade) { case 'A': { System.out.println("Excellent!"); break; } case 'B': { ...
Switchhas evolved over time. New supported types have been added, particularly in Java 5 and 7. Also, it continues to evolve —switchexpressions will likely be introduced in Java 12. Below we’ll give some code examples to demonstrate the use of theswitchstatement, the role of thebreakstatem...
本文将深入探讨Java SE 8版本中switch语句的字节码层面,解析switch语句的细节,并通过人工反编译其编译产物,来探索字符串switch和枚举switch的具体实现方式。switch语句要求其表达式参数必须为char、byte、short、int、Character、Byte、Short、Integer、String、Enum之一。若参数为null,则会抛出NullPointerExcept ...
classTest{staticinttest(intvar0){switch(var0){case1000:return0;case100:return1;case10:return2;default:return-1;}}}Compiledfrom"Test.java"classTest{Test();Code:0:aload_01:invokespecial#1// Method java/lang/Object."<init>":()V4:returnstaticinttest(int);Code:0:iload_01:lookupswitch{// ...
The switch case (statement) in C++ is a control construct that determines which code block to execute by comparing an expression against predefined cases. Its behaviour can be altered using the break and default keywords. 17 mins read In C++, a variable can be verified for equality against...
break Statement in Java switch...case Notice that we have been using break in each case block. ... case 29: size = "Small"; break; ... The break statement is used to terminate the switch-case statement. If break is not used, all the cases after the matching case are also executed...
Also, preview featuresmightchange over two or more Java versions, until they are permanently added to the Java language. For example, when the Switch Expressions were introduced as a preview language feature in Java 12, its case label used the keywordbreakto return a value, which was later ch...
We can also check for vowel or consonant using a switch statement in Java. Example 2: Check whether an alphabet is vowel or consonant using switch statement public class VowelConsonant { public static void main(String[] args) { char ch = 'z'; switch (ch) { case 'a': case 'e': cas...